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Incomplete Dominance vs. Codominance — What's the Difference?

Edited by Tayyaba Rehman — By Fiza Rafique — Published on December 2, 2023
Incomplete Dominance involves blending of traits; Codominance displays both traits distinctly.
Incomplete Dominance vs. Codominance — What's the Difference?

Difference Between Incomplete Dominance and Codominance

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Key Differences

In the realm of genetics, Incomplete Dominance refers to the blending of two parental traits, producing an intermediate offspring phenotype. Conversely, Codominance refers to the scenario where both parental traits appear distinctly in the offspring without blending.
Fiza Rafique
Dec 02, 2023
When Incomplete Dominance is at play, neither allele for a specific trait fully dominates the other. Hence, neither trait is fully expressed. Codominance, on the other hand, ensures that both alleles for a trait are fully expressed, leading to a phenotype where both traits are visible.
Fiza Rafique
Dec 02, 2023
An often-cited example for Incomplete Dominance is the crossbreeding of a red-flowered and white-flowered plant, resulting in pink-flowered offspring. In terms of Codominance, crossing a black chicken with a white one could produce a checkered-pattern offspring, where both colors distinctly appear.
Fiza Rafique
Dec 02, 2023
Incomplete Dominance essentially creates a middle-ground phenotype, a blend or mixture of both parental traits. Meanwhile, Codominance allows both parental traits to stand out, unblended and distinctly identifiable in the offspring.
Fiza Rafique
Dec 02, 2023
Understanding the distinction between Incomplete Dominance and Codominance is crucial in genetics. While both concern the expression of traits from different alleles, Incomplete Dominance merges these traits, whereas Codominance preserves their individuality.
Fiza Rafique
Dec 02, 2023
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Comparison Chart

Trait Expression

Blended
Distinct and unblended
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Dec 02, 2023

Resulting Phenotype

Intermediate of two traits
Displays both traits
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Dec 02, 2023

Example

Pink flowers from red and white parents
Checkered chickens from black and white parents
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Dec 02, 2023

Allele Behavior

Neither dominates
Both are fully expressed
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Dec 02, 2023

Visual Representation

Middle ground between traits
Both traits visible side by side
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Dec 02, 2023

Compare with Definitions

Incomplete Dominance

Produces an intermediate phenotype.
The concept of Incomplete Dominance explains the appearance of unexpected intermediate phenotypes.
Fiza Rafique
Oct 25, 2023

Codominance

Neither allele masks the other.
In Codominance, both alleles contribute equally to the phenotype.
Fiza Rafique
Oct 25, 2023

Incomplete Dominance

Blending of two distinct traits.
When a red and white flower breed, Incomplete Dominance produces pink flowers.
Fiza Rafique
Oct 25, 2023

Codominance

Produces offspring displaying both parental traits.
Codominance ensures that neither parent's trait gets overshadowed in the offspring.
Fiza Rafique
Oct 25, 2023

Incomplete Dominance

Neither allele is dominant over the other.
Due to Incomplete Dominance, neither the red nor the white trait fully prevails.
Fiza Rafique
Oct 25, 2023

Codominance

Each allele is equally dominant.
Thanks to Codominance, no trait gets subdued or masked by the other.
Fiza Rafique
Oct 25, 2023

Incomplete Dominance

Doesn't fully express either allele.
Because of Incomplete Dominance, both original traits get diluted in the offspring.
Fiza Rafique
Oct 25, 2023

Codominance

Distinct, unblended representation of traits.
Codominance retains the integrity of both original traits without blending.
Fiza Rafique
Oct 25, 2023

Incomplete Dominance

Parental traits merge in offspring.
Incomplete Dominance ensures that offspring traits are a mix of both parents.
Fiza Rafique
Oct 25, 2023

Codominance

Both traits from parents are fully expressed.
Due to Codominance, a cross between a black and white chicken can result in a checkered offspring.
Fiza Rafique
Oct 25, 2023

Codominance

A heterozygous condition in which both alleles at a gene locus are fully expressed in the phenotype.
Fiza Rafique
Oct 19, 2023

Codominance

(genetics) A condition in which both alleles of a gene pair in a heterozygote are fully expressed, with neither one being dominant or recessive to the other.
Fiza Rafique
Oct 19, 2023

Common Curiosities

In Codominance, do the traits get mixed?

No, both traits from the parents are expressed without mixing.
Fiza Rafique
Dec 02, 2023

Is one allele dominant in Incomplete Dominance?

No, neither allele is dominant, leading to a blend of traits.
Fiza Rafique
Dec 02, 2023

Can you provide an example of Incomplete Dominance?

Yes, when a red-flowered plant and a white-flowered plant produce pink-flowered offspring.
Fiza Rafique
Dec 02, 2023

How is the phenotype affected by Incomplete Dominance?

The resulting phenotype is an intermediate or blend of the two parental traits.
Fiza Rafique
Dec 02, 2023

Is the pink flower in Incomplete Dominance a new trait?

It's an intermediate phenotype resulting from the blending of red and white traits.
Fiza Rafique
Dec 02, 2023

How does Codominance display in offspring?

Codominance displays both parent traits distinctly without blending.
Fiza Rafique
Dec 02, 2023

What is the main difference between Incomplete Dominance and Codominance?

Incomplete Dominance involves blending of traits while Codominance shows both traits distinctly.
Fiza Rafique
Dec 02, 2023

Can you give an animal example for Codominance?

Yes, when a black chicken and a white chicken produce offspring with a checkered pattern.
Fiza Rafique
Dec 02, 2023

Do both parental traits appear in Codominance?

Yes, both traits appear side by side without blending.
Fiza Rafique
Dec 02, 2023

Are the traits in Codominance considered dominant or recessive?

Both traits are considered equally dominant, and both are expressed.
Fiza Rafique
Dec 02, 2023

In genetics, which concept leads to a middle-ground phenotype?

Incomplete Dominance leads to a middle-ground phenotype.
Fiza Rafique
Dec 02, 2023

Does Incomplete Dominance lead to a third phenotype?

Yes, it leads to an intermediate phenotype, different from both parents.
Fiza Rafique
Dec 02, 2023

Why don't we see blending in Codominance?

Because both alleles are fully and equally expressed, retaining their distinct appearances.
Fiza Rafique
Dec 02, 2023

Can Incomplete Dominance and Codominance occur for the same trait?

Not for the same trait in the same organism, as they are two distinct genetic mechanisms.
Fiza Rafique
Dec 02, 2023

Which concept, Incomplete Dominance or Codominance, displays a more clear distinction of parental traits?

Codominance displays a clear distinction of parental traits without blending.
Fiza Rafique
Dec 02, 2023

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Author Spotlight

Written by
Fiza Rafique
Fiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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